Vulnerability Report

CVE-2026-5172

Title: Buffer Overflow (Heap Out-of-Bounds Read) in dnsmasq

Memory Corruption

Proof Of Concept

PoC Available for CVE-2026-5172

CWE Category NVD-CWE-noinfo
Published Date May 11, 2026
Modified Date May 13, 2026
Exploit Status Available
Score 7.3 CVSS v
Exploit Probability (EPSS)
0.61%

Vulnerability Summary

CVE-2026-5172: A buffer overflow in dnsmasq’s extract_addresses() function allows an attacker to trigger a heap out-of-bounds read and crash by exploiting a malformed DNS response, enabling extract_name() to advance the pointer past the record’s end.

Impacted Vendors

Analysis in Progress...

Reference Links

CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity HIGH
7.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-5172 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/lottiedeyan/CVE20265172poc
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Stack

No specific products linked.